Diffusion plate for oxygenation treatment of sludge or the like



FIG. 1 is a top plan view of a diffusion plate for oxygenation treatment of sludge or the like showing my new design;

FIG. 2 is a side elevational view thereof;

FIG. 3 is another side elevational view thereof, taken from a position ninety degrees from that of FIG. 2;

FIG. 4 is a bottom plan view thereof; and

FIG. 5 is a perspective view thereof, the broken line representation of additional diffusion plates and a distribution pipe is for purposes of illustration only. 

The ornamental design for a diffusion plate for oxygenation treatment of sludge or the like, as shown and described. 